import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/home.vue'


Vue.use(VueRouter)

const routes = [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    { path: '/home', component: Home }
]

const router = new VueRouter({
    routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to将要访问的路径
    // from代表从哪个路径跳转而来
    // next是一个函数，表示放行
    //  next()直接放行 next('/login)强制跳转
    if (to.path == '/login') return next();
    // 获取token,因为token 已经存到客户端了，在客户端获取
    const tokenStr = window.sessionStorage.getItem('token');
    if (!tokenStr) return next('/login');
    next();
})

export default router